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In 1962, during the construction of the Autostrada del Sole, the archaeological remains of the river port on the Tiber Amerinum Castellum were found. The trace starts from the prehistoric period and the port had been operating continuously since the first century BC to the twelfth or thirteenth century AD. From 1000s it was subject to the Abbey of Farfa. On the hill above the harbour are the ruins of the towers of the castle of Castiglioni.